Scraper attachment for hoist apparatus.



PATENTED JUNE 30, 1903 S. E. LEONARD.

SGRAPER ATTACHMENT FOR HOIST APPARATUS.

APPLICATION FILED MAR. 16, 1903.

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S. E. LEONARD. SGRAPBR ATTACHMENT FOR HOIST APPARATUS.

APPLICATION FILED MAR. 16. 1903.

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No. 782,571. PATENTED JUNEB'O, 1903. S. E. LEONARD.

SGRAPBR ATTACHMENT FOR HOIST APPARATUS.

APPLIOATIOH FILED MAB. 16 1903.

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UNITED STATES Patented an. 36, 190a.

PATENT OFFICE.

SCRAPER ATTACHMENT FOR'HOIST APPARATUS;

SPECIFICATION forming part of Letters Patent No. 732,571, dated June 30, 1903. Application filed March 16, 1903. Serial No. 147,901. (No model.)

To all whom it may concern:

Be it known that I, SAMUEL E. LEONARD, a citizen of the United States, residing at Ashtabula Harbor, in the county of Ashtabula and State of Ohio, have invented certain new and useful Improvements in Scraper Attachments for Hoist Apparatus; and I do doclare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a scraper attachment for clam-shell hoists adapted to be used in the holds of vessels for handling loose freight, all substantially as shown and described, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a cross-section of a vessel and an elevation of my improved scraping attachment and a bucket shown in' connection therewith, as hereinafter fully described. Fig. 2 is a side elevation of the scraper attachment itself with a cross-section of a portion of the yessel and the supports and operating means for the scraper shown more or less in outline.

Fig. 3'is a perspective view of the scraper itself, and Fig. 4 is a plan view of Fig. l.

The apparatus as thus shown and described comprises more especially the scraper mechanism for drawing the loose freight or material, such as iron-ore and coal, inward from the sides of the vessel toward the middle or center of the hold, so as to bring the freight within reach of the bucket. This bucket is usually of the so-called clam-shell pattern, adapted to open and reach out on both sides to gather in its load and then close up under power applied for this purpose through cords or cables and be carried up and out to unloading position, as in common practice; but a bucket of this kind can only work beneath the hatch through which it is lowered and has no means whereby freight lying beyond the grasp of its wings can be reached. Hence there is always involved much expensive hand labor for working the freight from the sides and between hatches to a point within the range of the bucket, and it is this expense and labor chiefly which my invention is designed to obviate, while at the same time unloading is facilitated as well as cheapened. To these ends I employ mechanism substantially as shown, comprising suitable upright support or frame F of such elevation and strength as the work may need and which stands firmly-or is erected upon the dock D; where unloading of the vessel or boat A takes place. Any suitable structure, fixed or movable, may be employed as this frame. Upon the said frame or supporting structure F, I have a boom B, much as usual, which is adapted to reach over the boat or vessel and carries bucket O and a scraper mechanism aggregated under designation D. Bucket C and mechanism D are operated in dilferent vertical planes, but may come into. close working relation at times, and both are operatively suspended from boom B, as well as adapted to be operatedtherefrom, through suitable cable or rope connections, as will now appear. V

In this description it is assumed that bucket O is of a well-known pattern and supported and operated in a well-known way, having a small carriage c on the double track of boom '13, from which it is suspended by there as may be needed to operate the same. Scraper -D is suspended by cables 2 and 3 from rods, bars, or tracks 4 at the sides of the boom, and the scraper is suspended and operated from these by the two cables 2 and 3, while cable 6 serves to fix the scraper in one position or another back and forth on the boom or on rods 4 thereon, according to the working position wanted in any given case. A drum 7 is provided, through which this cord or cable is controlled by power from the engine. (Not shown.) The scraper itself comprisestwo wings or sections 9 and 10, pivoted at their inner ends on a central frame 12' of any suitable kind or construction and which carries sheaves 14 here and there over ropes or cables, and with sheaves here and 4 which the cables or cords 2 and 3 run and are supported. Cross -rods' 15 connect the sides of frame 12, and some or all of the said sheaves 14 are or may be supported on these rods. Cable 2 passes down and is affixed on i one of the upper or inner cross-rods 15' at a point 16, while cable or cord 3 passes down over two sheaves 14 and. engages one of the outer or lower rods or rounds 15 at 17. Each cable 2 and 3, respectively, has its own drum 18 and 19, respectively, over which it is wound, and the corresponding cords of the two wings have drums 18 and 19, respectively. Thus cables 2 for said wings go to drum or drums 18 and cables 3 go to drum or drums 19, and these drums also and obviously are power-controlled from the engine; but the connections therewith are not shown.

Now in operation the rotation of drum l8 alone will bodily raise the scraper with the wings spread or folded, as may be, and drum 19 controls the closing and opening of the wings. If they be lowered to working position and spread, as in Fig. 2, for work, the

. said wings can be drawn forcibly toward folding position by suitably turning or winding drum 19. Then and in this manner they do their work, having each a suitable scraperblade 22 to engage in the material and being both drawn toward thecenter and in a large measure held down to work by the weight of the scraper. However, while this drawing together of the scraper is going on drum 18 should be turned enough to take up all slack in cables 2, and the scraper is designed to be controlled by or through the said drums and cables in the entire operation of the scraper, and perfect control thereof is afforded by these means.

Suitable hangers 24, with sheaves, are engaged on side rods 4, over which the cables 2 and 3 travel and are suspended.

The mechanism for controlling the scraper is so placed on the boom as not to interfere with the operations of the bucket, and, as already indicated, both scraper and bucket are suspended from the boom and operated therefrom as well.

The scraper-blade 22 is support-ed to swing on a cross-shaft 25, mounted at the end of the wing-arms, and thetop of blade 22 has a cable 26 attached thereto which connects with cable 2. A cable 27 is attached to blade 22 below shaft 25, which cable connects with cable 3.

\Vhat I claim is- 1. In means for unloading loose freight from the holds of vessels, a scraper to draw the freight within reach of a bucket comprising a pair of wings and a support on which said wings are pivoted at their inner ends, and cables connecting with said wings between their ends, substantially as described.

2. A scraper mechanism for holds of vessels consisting of a suitable body part, scraper-wings pivoted thereon at their inner ends and means to control the said wings to give them the scraping efiect comprising cables adapted to be drawn over said body part, substantially as described.

3. For unloading vessels carrying loose freight, a scraper having a pair of wings pivoted at their adjacent ends, and cables to control said wings, substantially as described.

4:. The scraper comprising two wings with scraper attachments on their outer ends, a central part on which said wings are pivoted and a set of cables for controlling each wing, substantially as described.

5. The scraper having a body part and two wings pivoted thereon having each a scraper at its end, a pair of cables for each wing and drums for taking up and letting out said cables, the said cables in each wing having different points of attachment thereon, substantially as described.

6. In means for unloading loose freight in the holds of vessels, the combination of a boom, a bucket supported therefrom and a scraper suspended from the boom and constructed to draw the freight to the bucket, substantially as described.

7. The boom and the bucket operatively suspended therefrom on a carrier, in combination with a scraper supported from the sides of the boom outside the path of the bucket-carrier, substantially as described.

8. In an apparatus substantially as described, a boom and a bucket-carrier thereon and a bucket suspended from said carrier, in combination with a two-winged scraper, cables supporting the scraper from the boom and drums for operating said cables located out at the side of the boom, substantially as described.

9. A boom in combination with a doublewinged scraper suspended from the boom, said scraper having a body part with sheaves thereon, cables running over said sheaves and engaged with the wings of the scraper, and means on the boom to locate the scraper in working position, substantially as described.

10. The boom having two pairs of tracks lengthwise, in combination with a bucket suspended from the inner tracks, and a scraper suspended from the outer tracks, substantially as described.

\Vitness my hand to the foregoing specification this 2Sth day of February, 1903.

SAMUEL E. LEONARD.

Witnesses:

HARRY K. BRAINARD, FRANK LAIRD. 

